Debris flow gully bed scouring scale model experiment device

The invention relates to the technical field of debris flow experiment devices, and discloses a debris flow gully bed scouring reduced scale model experiment device, which comprises a circulation detection unit and a dynamic simulation assembly, and is characterized in that the circulation detection unit comprises a circulation channel, a plurality of pairs of gates are movably arranged on the surface of the circulation channel, and an area formed between the gates is a sliding area; the top of the gate and the side wall of the circulation channel form a material storage area, the dynamic simulation assembly comprises a discharging box, and a discharging opening is formed in the side wall of the discharging box. The top position of the sliding area can be moved randomly through the dynamic simulation unit, the material sliding condition caused by landslide in the debris flow process can be simulated by utilizing the characteristic that the circulation detection unit opens a gate after the material storage are